Distribution of GCs and field stars in kinematic spaces: orbital energy (E) and projection of the total angular momentum onto the Galactic plane (L_perp) vs. the z component of the angular momentum (L_z). Top panel: star-by-star distribution in the E – L_z and L_perp – L_z spaces of GCs for which at least 60% of the stars are chemically compatible with ω Cen. Other GCs in our sample are shown as blue points (mean values). Bottom panel: distribution in the E – L_z and L_perp – L_z spaces of GCs, which are colour-coded according to the fraction of stars that are chemically compatible with ω Cen (see Table 1). Only GCs with a total number of stars greater than 15 are shown. For comparison, in both panels, the distribution of all APOGEE stars is shown as grey points. Note that the sign of L_z has been inverted from the usual sign of L_z in a right-handed system to enable a better comparison with other works in the literature.